mlemanczyk/even-perfect-numbers-scanner
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Pools renamed to FixedCapacityPools. Other fixed capacity collections added. Queues, concurrent queues and standard stacks replaced with fixed capacity stacks. MethodImplOptions.AggressiveInlining and .AggressiveOptimization added to simple methods and getters / setters. Variables optimized in few places.

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mlemanczyk committed 2025-12-11 21:10:19 +01:00
1 parent 547d43de84
commit 260aa19e44
25 files changed
+1372 -1300
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PerfectNumbers.Core/PrimeOrderCalculator.Hybrid.cs
+4 -4
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@@ -67,7 +67,7 @@ internal static partial class PrimeOrderCalculator
}
ulong prime64 = (ulong)prime;
Queue<MontgomeryDivisorData> divisorPool = MontgomeryDivisorDataPool.Shared;
FixedCapacityStack<MontgomeryDivisorData> divisorPool = MontgomeryDivisorDataPool.Shared;
divisorData = divisorPool.FromModulus(prime64);
ulong order64 = CalculateHybrid(gpu, prime64, previous, divisorData, config);
divisorPool.Return(divisorData);
@@ -83,7 +83,7 @@ internal static partial class PrimeOrderCalculator
}
[MethodImpl(MethodImplOptions.AggressiveOptimization)]
private static void CollectFactorsHybrid(PrimeOrderCalculatorAccelerator gpu, Span<ulong> primeSlots, Span<int> exponentSlots, ref ulong[] primeSlotArray, ref int[] exponentSlotArray, ref int factorCount, List<PendingEntry> pending, Stack<ulong> compositeStack, long deadlineTimestamp, out bool pollardRhoDeadlineReached)
private static void CollectFactorsHybrid(PrimeOrderCalculatorAccelerator gpu, Span<ulong> primeSlots, Span<int> exponentSlots, ref int factorCount, List<PendingEntry> pending, FixedCapacityStack<ulong> compositeStack, long deadlineTimestamp, out bool pollardRhoDeadlineReached)
{
while (compositeStack.Count > 0)
{
@@ -169,10 +169,10 @@ internal static partial class PrimeOrderCalculator
if (config.PollardRhoMilliseconds > 0)
{
long deadlineTimestamp = CreateDeadlineTimestamp(config.PollardRhoMilliseconds);
Stack<ulong> compositeStack = ThreadStaticPools.RentUlongStack(4);
FixedCapacityStack<ulong> compositeStack = ThreadStaticPools.RentUlongStack(4);
compositeStack.Push(remaining);
CollectFactorsHybrid(gpu, primeSlots, exponentSlots, primeSlotArray: ref primeSlotArray, ref exponentSlotArray, ref factorCount, pending, compositeStack, deadlineTimestamp, out limitReached);
CollectFactorsHybrid(gpu, primeSlots, exponentSlots, ref factorCount, pending, compositeStack, deadlineTimestamp, out limitReached);
if (limitReached)
{